So one common part replacement I find a lot of Pathfinders (4WD/Off Road versions) have is a failure of the oil seals around the output shafts from the transfer case to front final drive. This seems to arise from perished/worn rubber seals or a groove that wears into the companion ...
I have a 2009 Pathfinder (VQ40DE) that I am shortly to do a coolant flush on. While I'm pretty familiar with the procedure in general I hear anecdotally the VQ40 engine can be a little tricky to remove airlocks/pockets from when undertaking a flush. Two points of interests if any of you ...